Hi,

You can use a custom editor descriotor and override the GridDefinition commands to not include "Edit" as an option. Something like below. Please note i have not tested the below code. But it should work.

[EditorDescriptorRegistration(TargetType = typeof(IList<MyCustomProperty>))]
public class MyCustomEditorDescriptor : CollectionEditorDescriptor<MyCustomProperty>
    {
        public override void ModifyMetadata(ExtendedMetadata metadata, IEnumerable<Attribute> attributes)
        {
            base.ModifyMetadata(metadata, attributes);
            var commands = base.GridDefinition.Commands - CollectionEditorCommands.Edit;
            metadata.EditorConfiguration.Add("commands", (object) commands );
        }
    }

~ Sujit